But Lampard, who is taking his first steps in management with Derby having starred under Mourinho during his Chelsea days, believes United's two trophies under the Portuguese in 2016-17 show his enduring capabilities.

"When you’re the manager of Manchester United, when you have the CV and the background of Jose Mourinho – and this is not ancient history, this is fresh history, the Europa League, the League Cup – then of course you have it," he told reporters.

"In terms of the 'special one' and that, those are just words. In terms of being a great manager, of course he is."

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